Clasp for metal bands or straps



May 25, 1954 x. KUONl 2,679,081

CLASP FOR METAL BANDS OR STRAPS Filed July 8, 1952 Fig.3

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qrromvsy Patented May 25, 1954 UNITED STATES PATENT OFFICE Claims priority, application Switzerland July 14, 1951 1 Claim.

The present invention relates to a clasp for metal bands or straps. The clasp comprises a backing part and Wing portions arranged on the two longitudinal sides of the backing part and gripping under the hoop iron when the clasp is applied. Now, according to the invention, the ends of the backing part are set back with respect to the ends of the wing portions, in such a way that, when a clasp is applied to a hoop-iron band, the wing portions gripping below the hoop iron project beyond the shorter backing part and form an underlying support for the knife that cuts the end of the hoop-iron band.

Preferably the wing portions of the clasp blanks enclose an obtuse angle with a convex backing part.

The accompanying drawing illustrates an embodiment of a clasp according to the invention, where Fig. 1 is a top plan view of a clasp blank,

Fig. 2 is a longitudinal section along line 2-2 of Fig. 4 through the clasp of Fig. I laid round a hoop-iron band, on a larger scale,

Fig. 3 is a side elevation of the clasp of Fig. 1; Fig. 4 is a top plan view of the clasp in position as in Fig. 2; and Fig. 5 is a section along line 5-5 of Fig. 2.

The blank of a clasp for metal bands or straps illustrated in Figs. 1 and 2 shows a backing part or center portion l which is slightly concave and wing portions 2 arranged at both sides of the said part i As can be seen from Fig. 1, the edges 3 of the backing part I are set back with respect to iron band 5 as shown in Figs. 2, 4 and 5, the wing portions 2 are bent under the hoop iron 5 and project endwise beyond the backing part I which lies on top of the hoop iron. Thus the portions 2 form an underlying support for the knife 5 which is used for cutting one end of the hoop-iron band. Owing to the fact that the wing portions project in the way described, the knife is prevented from distorting the hoop iron 5 at the end of the clasp in an undesirable manner.

The illustrated clasp is so formed as shown in Fig. 3, that it is possible to stack the clasp blanks in a space-saving manner in a clasp closing apparatus fitted with a magazine. In this illustrated form of the clasp, the wing portions enclose an obtuse angle with the convex backing part. Because of the convexity of the backing part, it is achieved that,when the backing part or center portion 1 is pressed flat, the wing portions 2 will enclose a certain angle with the center portion, and consequently need not be bent as much in order to secure the clasp to a hoop iron band as otherwise necessary.

What I claim is:

A clasp for connecting hoop iron bands consisting of a sheet metal body comprising prior to the application of the clasp, a rectangular center portion having two straight opposite sides and being cylindrically curved between said sides, and

.two rectangular wing portions adjoining said opposite sides, respectively, and extending equal lengths beyond said sides, said wing portions being flat and bent outward in the direction of the convex. face of said center portion, where said wing portions are attached to said center portion.

Number Name Date Swett July 16, 1872 

